While working on his second novel, John Sedgwick spiraled into a depression so profound that it very nearly resulted in suicide. An author acclaimed for his intimate literary excursions into the rarified, moneyed enclave of Brahmin Boston, he decided to search for the roots of his malaise in the history of his own storied family--one of America's oldest and most notable. Following a bloodline that travels from Theodore Sedgwick, compatriot of George...